Polyimide Polymer Glass-Free Capillary Columns for Gas Chromatography was written by Webster, Jackie G.;Marine, Susan S.;Danielson, Neil D.. And the article was included in Journal of Chromatographic Science in 2011.Safety of Ethyl 3-ethoxypropanoate The following contents are mentioned in the article:
Polymeric polyimide capillary tubing, both uncoated and coated with stationary phases of two polarities, is explored for use as capillary columns for gas chromatog. (GC). These glass-free polyimide columns are flexible and their small winding diameter of less than a cm around a solid support makes them compatible for potential use in portable GC instruments. Polyimide columns with dimensions of 0.32 mm internal diameter × 3 m are cleaned, annealed at 300°, and coated using the static method with phenylmethylsilicone (PMS). Separations of volatile organics were studied isothermally on duplicate sets of polyimide columns by GC with a flame ionization detector using split injection. Unlike the uncoated ones, the coated polyimide columns successfully sep. Grob test mix classes of alkanes, amines, and fatty acid Me esters. The relative standard deviations for retention time and peak area are 0.5 and 2.5 , resp. With the 3 m PMS-coated column connected to a retention gap to permit operation at its optimum flow rate of 30 cm/s, a plate count of 3200 or plate height of 1 mm is possible. Lack of retention and tailing peaks are evident for the polyimide polymer capillary columns as compared to that of a 3 m com. cross-linked PMS fused silica capillary. However, headspace analyses of an aromatic hydrocarbon mix and a Clearcoat automotive paint sample are viable applications on the PMS polyimide polymer column. (c) 2011 Preston Publications. This study involved multiple reactions and reactants, such as Ethyl 3-ethoxypropanoate (cas: 763-69-9Safety of Ethyl 3-ethoxypropanoate).
Ethyl 3-ethoxypropanoate (cas: 763-69-9) belongs to esters. Esters typically have a pleasant smell; those of low molecular weight are commonly used as fragrances and are found in essential oils and pheromones. Many esters have the potential for conformational isomerism, but they tend to adopt an s-cis (or Z) conformation rather than the s-trans (or E) alternative, due to a combination of hyperconjugation and dipole minimization effects. The preference for the Z conformation is influenced by the nature of the substituents and solvent, if present. Lactones with small rings are restricted to the s-trans (i.e. E) conformation due to their cyclic structure.Safety of Ethyl 3-ethoxypropanoate
Referemce:
Ester – Wikipedia,
Ester – an overview | ScienceDirect Topics